/**
* Copyright (c) 2025 Huawei Technologies Co., Ltd.
* This program is free software, you can redistribute it and/or modify it under the terms and conditions of
* CANN Open Software License Agreement Version 2.0 (the "License").
* Please refer to the License for details. You may not use this file except in compliance with the License.
* THIS SOFTWARE IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OF ANY KIND, EITHER EXPRESS OR IMPLIED,
* INCLUDING BUT NOT LIMITED TO NON-INFRINGEMENT, MERCHANTABILITY, OR FITNESS FOR A PARTICULAR PURPOSE.
* See LICENSE in the root of the software repository for the full text of the License.
*/

/* !
 * \file kernel_micro_gather_mask_impl.h
 * \brief
 */
#ifndef ASCENDC_MODULE_MICRO_GATHER_MASK_IMPL_H
#define ASCENDC_MODULE_MICRO_GATHER_MASK_IMPL_H

namespace AscendC {
namespace MicroAPI {
template <typename T = DefaultType, GatherMaskMode store = GatherMaskMode::NO_STORE_REG, typename RegT>
__simd_callee__ inline void GatherMaskImpl(RegT &dstReg, RegT srcReg, MaskReg mask)
{
    using ActualT = typename RegT::ActualT;
    static_assert(std::is_same_v<T, DefaultType> || std::is_same_v<T, ActualT>, "T type is not correct!");
    static_assert(SupportType<ActualT, int8_t, uint8_t, int16_t, uint16_t, int32_t, uint32_t, half, float>(),
        "current data type is not supported on current device!");
    constexpr auto modeValue = std::integral_constant<::StoreMode, static_cast<::StoreMode>(store)>();
    vsqz(dstReg, srcReg, mask, modeValue);
}

template <typename T = DefaultType, typename RegT> __simd_callee__ inline void PrefixSumImpl(RegT &dstReg, MaskReg &mask)
{
    using ActualT = typename RegT::ActualT;
    static_assert(std::is_same_v<T, DefaultType> || std::is_same_v<T, ActualT>, "T type is not correct!");
    static_assert(SupportType<ActualT, int8_t, uint8_t, int16_t, uint16_t, int32_t, uint32_t>(),
        "current data type is not supported on current device!");
    vusqz(dstReg, mask);
}

template <SpecialPurposeReg spr = SpecialPurposeReg::AR> __aicore__ inline int64_t GetSprImpl()
{
    static_assert(SupportEnum<spr, SpecialPurposeReg::AR>(),
        "current GetSpr api only support SpecialPurposeReg AR on current device!");
    return get_ar();
}

template <SpecialPurposeReg spr = SpecialPurposeReg::AR> __simd_callee__ inline void ClearSprImpl()
{
    constexpr uint8_t SPR_AR_VALUE = 74;

    static_assert(SupportEnum<spr, SpecialPurposeReg::AR>(),
        "current ClearSpr api only support SpecialPurposeReg AR on current device!");
    constexpr auto sprValue = std::integral_constant<::Spr, static_cast<::Spr>(SPR_AR_VALUE)>();
    sprclr(sprValue);
}

template <typename T = DefaultType, typename U = DefaultType, typename RegT, typename RegU>
__simd_callee__ inline void GatherImpl(RegT &dstReg, RegT &srcReg, RegU &indexReg)
{
    using ActualT = typename RegT::ActualT;
    using ActualU = typename RegU::ActualT;
    static_assert(std::is_same_v<T, DefaultType> || std::is_same_v<T, ActualT>,
        "Gather T data type is not correct on current device!");
    static_assert(std::is_same_v<U, DefaultType> || std::is_same_v<U, ActualU>,
        "Gather U data type is not correct  on current device!");
    static_assert(SupportBytes<ActualT, 1, 2, 4>(), "Gather does not support current data type on current device!");
    static_assert(SupportType<ActualU, uint8_t, uint16_t, uint32_t>(),
        "Gather does not support current data type on current device!");
    static_assert((sizeof(ActualT) == 1 && sizeof(ActualU) == 1) || (sizeof(ActualT) == 2 && sizeof(ActualU) == 2) ||
        (sizeof(ActualT) == 4 && sizeof(ActualU) == 4),
        "Gather does not support current data type combination on current device!");
    if constexpr (sizeof(ActualT) == 1) {
        vselr((RegTensor<uint8_t> &)dstReg, (RegTensor<uint8_t> &)srcReg, (RegTensor<uint8_t> &)indexReg);
    } else if constexpr (sizeof(ActualT) == 2) {
        vselr((RegTensor<uint16_t> &)dstReg, (RegTensor<uint16_t> &)srcReg, (RegTensor<uint16_t> &)indexReg);
    } else if constexpr (sizeof(ActualT) == 4) {
        vselr((RegTensor<uint32_t> &)dstReg, (RegTensor<uint32_t> &)srcReg, (RegTensor<uint32_t> &)indexReg);
    }
}
} // namespace MicroAPI
} // namespace AscendC
#endif